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The amplified output signal is picked up single-ended from preamp and is given to the _________

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in Biomedical Instrumentation by (76.6k points)
The amplified output signal is picked up single-ended from preamp and is given to the _________

(a) Power Amplifier

(b) Lead Selector

(c) Pen Motor

(d) Paper motor

This question was addressed to me in a job interview.

The question is from System Concepts in portion Patient Monitoring System of Biomedical Instrumentation

1 Answer

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Best answer
Right answer is (a) Power Amplifier

Best explanation: The preamplifier is usually a three or four stage differential amplifier having a sufficiently large negative current feedback, from the end stage to the first stage, which gives a stabilizing effect. The amplified output signal is picked up single-ended and is given to the power amplifier. The power amplifier is generally of the push-pull differentical type.

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